package com.qf.mapper;

import org.apache.ibatis.annotations.Update;

/**
 * @author sunyamei
 * @version V1.0
 * @Project javase2203
 * @Package com.qf.mapper
 * @Description:
 * @Date 2022/8/17 11:39
 */
public interface UserMapper {

    @Update("update user set money =money -500 where id=1")
    public Integer decr();
}
